Implement handle



'L. I. GOLDBLATT IMPLEMENT HANDLE Filed Nov. :50, 1936 r hllnnn: 2 I

BY% g ATTORNEY Patented Apr. 13, 1937 ATENT FF C .11: g V y :IMPLEMENTHANDLE I Louis I. Goldblatt, Kansas City, Mo. I Application November 30,1936, Serial No. 113,295

'My invention relates to implement handles, and more particularly to ahandle for plasterers trowels.

Handles for plasterers trowels have been attached by means of an axial,longitudinal opening made in the handle through which extended ametallic member. This metallic member was usually a circularcross-section and had its end projecting beyond the handle. This end wasthreaded and was adapted to receive a securing nut to prevent the handlefrom moving longitudinally off of the metal core. The metal core was inturn either attached to or made integral I with the attaching piece towhich the trowel face it was secured. The handle, when new, was heldagainst rotation with respect to the core by means of friction. Afterthe trowel had been in use for a period of time, the handle would becomeloose and tend to rotate. It could be tightened at first by means of thenut at the end of the core but after a time it would be practicallyimpossible to tighten it, with the result that accurate work could notbe achieved. In plasterers trowels, as in many other implements, theskill of the workman is exercised by the position of the implement withrespect to the handle. In plasterers trowels', for example, the relativeposition of the trowel face to the handle is especially important. Inuse there is considerable, force tending to rotate the handle, and ifthe handle is not substantially rigidly secured to the trowel the trowelbecomes practically worthless for use.

In the trowels of the prior art, little attention has been paid to thebalance of the trowel as determined by the relative position of thehandle with respect to the trowel face and the shape of the attachingpost of the handle.

One object of my invention is to provide an implement handle in whichthe handle is rigidly and accurately positioned in such a manner that itwill remain in a fixed relative position to the implement.

3 Claims. (o1. 1s 110) trowel equipped with an implement handle of myinvention.

Fig. 2 is a perspective View of the attaching post and handle core withthe handle removed.

Fig. 3 is a perspective view of the handle adapted to be used with thehandle core shown in Fig. 2.

Fig. 4 is a plan view of the attaching post and handle core shown inFig. 2.

Fig. 5 is a sectional view taken on the line 5 5 of Fig. 4.

Fig. 6 is a sectional view on the line 6-6 of Fig. 4.

Fig. 7 is a longitudinal sectional view through the handle and handlecore.

In general, my invention contemplates the provision of ahandle-receiving member or handle core, which may be made integral withor secured to the implement in any suitable manner. For example, in aplasterers trowel the trowel post, the trowel face carrying member andhandle core are made of one piece. The trowel post is rearwardlyinclined or streamlined and carries integral therewith a fin-likemember, which is formed generally with trapezoidal cross-section. Thefin member has a straight lower edge and a curved upper edge, the upperedge corresponding with the shape of the handle. The handle is made outof any suitable material and is provided with a slot correspondinggenerally with the cross-sectional shape of the fin except that theinclination of the sides of the slot of the handle is slightly greaterthan the inclination of the sides of the fin, so that when the handle isslid home into position a wedging action will take place tending to holdthe handle in position on the fin. The trowel post is provided with ashoulder and the handle is provided with a horizontal surface adapted toengage said shoulder when the handle is positioned. Suitable fasteningmeans are provided for preventing the relative movement of the handleand the fin after the handle is in position.

More particularly, referring now to the drawing, a trowel post I, whichis rearwardly inclined or streamlined and provided with a broadened faceupon which the thumb of the plasterer may rest, is formed integral witha fin 2 and a trowel face attaching member 3 to which the trowel face lis secured in any suitable manner. A handle 5 is secured to the fin 2 bymeans of a slot 6 formed in the handle 5. The handle may be furthersecured to the fin by means of screw 1 and pin 8. The trowel post I ismade with a reentrant portion 9 having a surface ex tendingsubstantially longitudinally, as can readily be seen by reference toFig. 2. The handle 5 is provided with a projection l having its lower.face H conforming with the reentrant portion 9. The fin 2 is formed ofa substantially trapezoidal cross-section, as can readily be seen byreference to Figures 5 and 6. The slot 6 in the handle is formed toconform generally with the cross-sectional shape of the fin.Longitudinal sections of the fin 2 taken in planes generally parallel tothe trowel face would be substantially rectangular. Similar longitudinalsections of the slot would be substantially trapezoids, with the 15 basetoward the trowel post, that is, the side walls of the slot of thehandle taper gradually toward the rear, so that when the handle is slidhome on the fin there will be a slight wedging action tending to holdthe trowel handle frictionally in place. In order to avoid undue stressupon the trowel handle, I secure the handle at its rear end by means ofa screw 1 adapted to pass through the fin through an opening l2 thereinand screw into the handle 5, as can readily be seen by refer- 5 ence toFig. '7. A rivet 8 may be passed through a hole to an opening !3provided in the fin, as

can readily be seen by reference to Fig. l. The

projection ll) of the handle interfits with the reentrant portion 9, sothat the surface II will ride 0 upon the shoulder of the reentrantportion and prevent rotation of the handle around a horizontal,transverse axis. The depth of the fin prevents rotation around thelongitudinal axis while the length of the fin prevents rotation around avertical axis. In the trowels of the prior art, the core memberprevented rotation of the handle around a vertical axis and around ahorizontal, transverse axis. Only friction prevented rotation around alongitudinal axis. In some implement 40 handles of the prior art,two-piece handles were resorted to to obtain a handle which would besecured against rotation around a longitudinal axis. The two-piecehandles were secured by rivets which ultimately would work loose andinvolved a costly assembly operation. It is to be noted that the handleof my trowel is made of a single piece and rigidity around three axes isobtained by means of my assembly. The slight r tapering of the handleslot longitudinally with a respect to the handle fin rigidly places thehandle in a predetermined position to the implement to which it isattached. The shoulder and the coacting reentrant portion and the screw1 prevent rotation around a horizontal, transverse axis, and the rivet 8aids in this action.

It will be observed that I have accomplished the objects of myinvention. I have provided an implement handle which is rigidly andaccurately positioned in such a manner that it will remain in a fixedrelative position to the implement and will not become loose or detachedin use. In practice, the handle may be made out of any suitablematerial, such as wood, fibre, pressed paper, leather, phenolcondensation products, bone, horn or hard rubber. The fin may beprovided with lightening holes l4 and 15.

It is to be understood that while I have described my handleconstruction chiefly with respect to a plasterers trowel, it may be usedon any implement.

It will be understood that certain features and sub-combinations are ofutility and may be employed without reference to other features andsub-combinations. This is contemplated by and is within the scope of myclaims. It is further obvious that various changes may be made indetails within the scope of my claims without departing from the spiritof my invention. It is, therefore, to be understood that my invention isnot to be limited to the specific details shown and described.

Having thus described my invention, what I claim is:

1. In an implement, a handle, means for at- 1 taching the handle to theimplement including a fin extending into the handle, said fin being ofsubstantially trapezoidal cross-section.

2. In an implement, a handle, means for attaching the handle to theimplement including a fin, said fin being of substantially trapezoidalcross-section, a slot of substantially trapezoidal cross-section formedin said handle, said fin being adapted to fit into said slot therebypositioning said handle on said fin.

3. In a plasterers trowel, a trowel post formed with an integral fin anda reentrant portion, a handle formed with a slot adapted to receive saidfin and a toe adapted to seat in said reentrant portion, and means forpreventing movement of said fin out of said slot.

LOUIS I. GOLDBLATT.

